own memory size of process (exclude memory shared from parent)

[Shabanov Vladislav]

Title: own memory size of process (exclude memory shared from parent)

Dear hackers!

Does anybody knows how to calculate own memory size of process.
Ps or top shows resident/total size of process, but both these
values include memory pages shared from parent.

I want know how much memory use children of my Apache. Top shows
that each httpd uses 4Mb, but i suppose that 2-3Mb is shared from
parent.

Thanks,
        Vlad